ci: Run PR label check only in pull request contexts (#94)

This is intended to only run the PR label checker for events occuring in
a pull request context (cases where the `event_name` is
`pull_request_target` and not pushes).

Author: mitchnegus

.github/workflows/release-drafter.yml

@@ -17,6 +17,7 @@ permissions:
 
 jobs:
   update_release_draft:
+    name: Update the release notes
     permissions:
       contents: write
       pull-requests: write
@@ -37,7 +38,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
   pr-checker:
     name: Ensure Proper Pull Request Labels
-    if: ${{ always() }}
+    if: github.event_name == 'pull_request_target'
     needs: update_release_draft
     permissions:
       pull-requests: read
@@ -47,4 +48,4 @@ jobs:
       - uses: docker://agilepathway/pull-request-label-checker:v1.6.65
         with:
           any_of: feature,fix,style,changed,refactor,perf,test,build,ci,chore,revert,deprecated,removed,security,documentation,dependencies
-          repo_token: ${{ secrets.GITHUB_TOKEN }}
+          repo_token: ${{ secrets.GITHUB_TOKEN }}